Further readings for the Canon EF 200-400mm f/4L IS USM Extender 1.4x ON

To provide photographers with a broader perspective about mobiles, lenses and cameras, here are links to articles, reviews, and analyses of photographic equipment produced by DxOMark, renown websites, magazines or blogs.

With a full-frame 18-Mpix CMOS sensor and twin Digic 5+ processers that’s capable of continuous bursts of up 12 fps – the fastest of any professional DSLR currently - the Canon EOS-1 Dx is the firm’s flagship press camera. We’ve assessed it with over 100 EF mount lenses, to see how well they perform. Read on to find out which models are the best optically and which, if any, you should avoid.

In the first part of our comprehensive lens recommendations for the new entry-level Canon EOS Rebel T5 / 1200D, we’ve assessed a raft of primes from both the maker and third parties to see how well they perform on the camera. As well as highlighting the best performers we’ve also taken a closer look at the best on a budget.

First seen at the Olympics in London in 2012, the Canon EF 200-400mm f/4 IS USM Extender 1.4x is a pro-oriented super-telephoto zoom with a built-in 1.4x tele-converter. Engaging this extender converts the zoom into a 280-560mm f/5.6 on a full frame camera, making this one of the most versatile lenses in the firm’s line up. Read on to see how well this $11,800 zoom performs with- and- without the 1.4x converter engaged while mounted to the Canon EOS 5D Mk III.